pool map cycle

[scidam]

I just ran your code and got:

Output:
[['0', '0', '0', '0', '0', 'f'], ['0', '0', '0', '0', '0', 'n'], ['0', '0', '0', '0', '0', 'x']]                                                                                                                                                                                                                            
[['0', '0', '3', '0', '0', 'f'], ['0', '0', '3', '0', '0', 'n'], ['0', '0', '3', '0', '0', 'x']] 

So, I cann't reproduce the problem.